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Charge And Discharge Protection Mode

Melin Sunergy Co.,Ltd | Updated: Feb 10, 2015

1, direct overcharge protection voltage: direct charge is also called emergency rechargeable, belonging to fast charge, usually when the battery voltage is low with high current and high voltage for battery charging, however, there is a point, also called points of protection, that is, values in the above table, when charging the battery terminal voltage is higher than these values, direct charge should be stopped. Overcharge protection voltage is usually "overcharge protection point" voltage when charging battery voltage above this point, otherwise, it is charging, the battery is damaged. [1]

2, equalizing charge voltage of the control point: straight after the end of charging, the battery will normally charge controllers aside for a period of time, makes voltage naturally fall, when falling into "recovery voltage" value, will enter the equalizing charge State. Why even charge? When straight after charging is completed, there may be individual cells "falling behind" (relatively low voltages), in order to take these individual molecules to pull back, so that all the battery voltage has an even consistency, therefore we're going to high voltage with a moderate current and then charge a little, we can see that so-called equalizing charge, the "equalization". Charging time should not be too long, generally a few minutes ~ a dozen minutes, time setting too long but harmful. Equipped with a small system with two batteries and equalizing charge of little significance. Therefore, the controller generally does not set fully, only two stages. [1]

3, and floating filling points voltage: General is are filling finished Hou, battery also was static reset a time, makes its end voltage natural whereabouts, dang whereabouts to "maintenance voltage" points Shi, on entered floating filling State, currently are used PWM (both pulse wide modulation) way, similar Yu "Juan flow charging" (that small current charging), battery voltage a low filling Shang point, a low filling Shang point, a unit a unit to to, so as not to battery temperature continued increased, this on battery for is is has benefits of, A great effect because the temperature inside the battery to charge and discharge. PWM mode is primarily designed to stabilize the battery voltage by adjusting the pulse width to reduce battery charging current. This is a very scientific charge management system. Specifically in the late charge, battery remaining capacity (SOC) at the >80%, you must reduce the charging current in order to prevent overcharging and excessive gas (oxygen, hydrogen gas and acid gas). [1]

4, over-discharge protection voltage: this is better understood. Battery discharge must not be less than this value, it is a standard rule. Battery manufacturers also have their own protection parameter (Enterprise or standard), but eventually to move closer to the national standard. Need to be aware of is that for security reasons, typically 12V battery overcharge protection voltage plus 0.3V artificially as a zero-point drift correction or control circuit with temperature compensation, voltage 12V battery deep discharge protection point: 11.10V, 24V system voltage deep discharge protection points to 22.20V. Currently is used in many production charge controller manufacturers 22.2V (24V system) standard.